The Turkish government has reporedly blocked access to Google public DNS service, essentially closing one of the most
popular backdoors that Turks used to circumvent the blocking to the social networking website.

Many Turkish Twitter users had recently started to use
specific DNS addresses that belonged to Google in order to
bypass the blocking ordered by the Turkish authorities earlier
this week.

According to Turkish newspaper Hurriyet, the Turkish
authorities didn't release any statement regarding the latest
move which is believed to be based a direct government order
and not a court ruling.

The Turkish government claimed that its decision to block
Twitter came after "hundreds of court rulings in Turkey"
ordering Twitter to remove content.

There are other public DNS services that Turks may use,
including Open DNS, as well setting up a VPN connection.

In the meantime, reports claim that that YouTube is also at
risk of being censored in Turkey as well.